Vanessa Hudgens is busting out from her innocent High School Musical character and ready to show she's all grown-up in the pages of Details' March issue.

The 22-year-old actress, who has no problem getting drenched for the sexy shoot, opens up about her experience working with Michael Caine, 77, in the upcoming Journey to the Center of the Earth. Ms. Hudgens tells the mag:

    "Throughout this whole movie we're trudging through the jungle. So, of course, we're sweating. I can't tell you how much time is spent putting oil on my chest. And Evian ... Just to look like I'm sweating. But your boobs don't really sweat, cleavage doesn't sweat. So it's kind of funny. But Michael's always telling the makeup artists that he'll take over and do it. I. Frickin'. Love. Him."

Zac Efron's ex also talks about toughening up thanks to a conversation with director Quentin Tarantino. Vanessa adds:

    "After the Oscars we were at Madonna's party. Quentin Tarantino was there, and I was talking to him for a while, probably after a few drinks, and I told him, 'We've gotta do something together.' And he was like, 'I would love to. That would be really great.' Slowly, I've gained balls. I used to be very shy. Nothing has happened with Tarantino yet. But I definitely tried to plant my seed. Hopefully he won't look back and think, 'Oh my God. That crazy b**ch.'"

Way to get our attention, Vanessa. This spread, and your way with words, definitely has us taking notice!

Check out the steamy behind-the-scenes footage from the photoshoot after the jump ...